Acta Photonica Sinica, Volume. 44, Issue 7, 701003(2015)
Numerical Simulation for Wind Lidar Based on Optical Fiber Mach-Zehnder Interferometer
An all-fiber incoherent wind lidar system was proposed and designed based on double-edge technique of optical fiber Mach-Zehnder interferometer. The algorithms for Doppler shift extraction and for wind velocity retrieval were theoretically analyzed. The optical fiber Mach-Zehnder interferometer used as a spectral analyzer in the proposed system, was discussed to optimize for wind velocity measurement based on the signals backscattered by the molecules. Performances including wind measurement sensitivity, signal-to-noise ratio and measurement error of lidar system were numerically simulated based on the U.S. standard atmospheric model. For a ground-based molecular wind lidar at a wavelength of 532 nm, an error in the line-of-sight velocity component of the wind was found to be smaller than 1.4 m/s up to an altitude of 20 km, with the line-of-sight wind velocity within the range of ± 100 m/s, a 300-shot average and a vertical resolution of 1 000 m. Obtained results show that the designed system can be applied for long-distance and large-scale wind velocity measurement. The system will be able to provide a technical solution for the development of the compact Doppler lidar.
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TAN Lin-qiu, HUA Deng-xin, WANG Li, HE Ting-yao, CHANG Bo. Numerical Simulation for Wind Lidar Based on Optical Fiber Mach-Zehnder Interferometer[J]. Acta Photonica Sinica, 2015, 44(7): 701003
Received: Dec. 18, 2014
Accepted: --
Published Online: Aug. 25, 2015
The Author Email: Lin-qiu TAN (linqiutan@sina.com)